AMSTA vs Dreo Smart 3-in-1 AC516S
We compare the AMSTA and the Dreo Smart 3-in-1 AC516S across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.
At a glance
| AMSTA | Dreo Smart 3-in-1 AC516S | |
|---|---|---|
| Our score | 6.8/10 | 8.5/10 |
| Best for | Moveable cooling in a heatwave without fitting a fixed unit, plus dehumidifying year-round | Moveable cooling in a heatwave without fitting a fixed unit, plus dehumidifying year-round |
| Not ideal for | Anyone wanting silent running or the lowest possible electricity use - a fan is cheaper but doesn't truly cool | Anyone wanting silent running or the lowest possible electricity use - a fan is cheaper but doesn't truly cool |
| Brand | AMSTA | Dreo |
Cooling Power (BTU)
AMSTA
Cooling power for this portable air conditioner is stated as 18,000 BTU. This rating indicates the unit's cooling capacity within its intended range, with higher BTU figures generally associated with quicker cooling when airflow is sufficient. The AMCLI180E is also described as having a dehumidifier mode, which can help reduce the sensation of dampness alongside cooling. The product title does not specify temperature-drop test results, how BTU varies by conditions, or a room coverage figure, so expectations should be set against typical use after installation, based on comfort changes rather than performance testing details.
Dreo Smart 3-in-1 AC516S
With a rated cooling capacity of 12000 BTU, this portable air conditioner is designed to cool small to medium indoor spaces, though the exact room size it can handle depends on factors such as insulation, ceiling height, sunlight exposure, and how much airflow is obstructed by furniture. In everyday use, the 12000 BTU rating indicates it can keep up when cooling demand is moderate, but it may fall short during sustained hot periods or after long gaps without cooling. In dehumidify mode, moisture removal can improve comfort as long as the temperature falls gradually. Effectiveness in dehumidify mode also depends on airflow distribution and the thermostat setting.
Room Size and Coverage
AMSTA
For a typical household, the AMSTA is listed for spaces up to 50 m², which gives a practical expectation for room coverage before purchase. It is described as a 3 in 1 mobile air conditioner, with a treated surface of 50 m², and that figure is used to guide the size of the room it can serve. Coverage can also be affected by factors like ceiling height, sunlight, insulation, and how much movement occurs around an open doorway (not stated). For best results, buyers should measure the room area, then consider whether multiple rooms, or poorly insulated spaces, may need extra capacity (not stated).
Dreo Smart 3-in-1 AC516S
Room size and coverage for the Dreo are best assessed using its 12,000 BTU cooling capacity as a baseline, since this is the stated cooling figure. How effectively it maintains a set temperature depends on factors such as insulation, window area, ceiling height and the amount of direct sun the room receives. For best airflow, the portable unit needs to be positioned in an open area rather than in a tight corner, so air can circulate. Smaller rooms generally reach comfortable temperatures faster, while larger rooms may take longer and require more consistent settings.
Modes and Dehumidifier Function
AMSTA
Often, the portable air conditioner is used in multiple modes as a "3 in 1" mobile unit that includes a dehumidifier function, alongside air conditioning. In dehumidifier mode, the aim is to reduce dampness in the treated space, listed as up to 50 m². Switching between modes is described in terms of conditions, such as using cooling on hotter days and dehumidifying during muggy periods. The unit's airflow rate is stated as 550 m3/h, supporting ongoing air movement.
Dreo Smart 3-in-1 AC516S
Beyond how quickly it can cool a space, the portable air conditioner is also defined by what it does once the room reaches a comfortable temperature, since it supports cooling, fan and dehumidifying in one unit. In cooling mode, it targets hot conditions, while fan mode helps circulate air when cooling is not needed. For damp rooms, dehumidifier mode is designed to remove water saturation, which can make indoor air feel less heavy. This flexibility reduces the need to switch appliances.
Noise Level and Energy Use
AMSTA
Noise level and energy use depend on the AMSTA's operating mode, as mobile air conditioners and dehumidifiers can behave differently across modes. In dehumidifier mode, the unit is designed to remove humidity while cooling the air indirectly, so power draw and fan speed may not match cooling-only operation. The unit is rated at 18000 BTU, with airflow up to 550 m³/h, which indicates stronger air movement and, as a result, it often runs louder than lower-speed operation. For practical day-to-night control, the key approach is to balance comfort against sound output while the unit is running.
Dreo Smart 3-in-1 AC516S
Noise level and energy use matter for comfort at night because a portable AC runs continuously to cool and dehumidify. The Dreo is positioned as a bedroom-friendly unit, but the product title does not state a specific noise level in dB. Because loud fan operation can interrupt sleep, sound performance needs confirmation from independent test results. Energy use is also a key concern, since cooling and dehumidifying typically require sustained operation to maintain conditions. The unit offers cool, fan and dehumidifier modes, so power draw can vary depending on the selected mode. It includes a 24-hour timer to help limit run time. Overall, exact efficiency and noise figures remain unspecified.
Installation, Hose and Setup
AMSTA
When the portable air conditioner is set up in a UK home, proper installation and hose placement matter as much as the cooling capacity, particularly because it is a mobile unit. Place the unit on a flat, stable surface with clear airflow around the intake and outlet. Connect the exhaust hose securely to the rear outlet, then route it as straight as possible towards the window or door opening. Keep the hose short and avoid sharp bends, as restrictions can reduce airflow. After positioning, run a quick test in dehumidifier mode, confirm that the hose outlet expels warm air consistently, and check for any gaps.
Dreo Smart 3-in-1 AC516S
Setting up the portable air conditioner is fairly straightforward, but it still requires careful attention to where the warm-air exhaust hose goes. It should be installed so the hose vents the hot air outside, because recirculating exhaust can reduce cooling and increase dampness. First, place the unit on a stable, level floor with enough clearance around the vents. Connect the exhaust hose securely, then route it with as few sharp bends as possible. For dehumidifier mode, a drainless setup still needs space to handle moisture. Switch the unit on, then pair the app using the supplied controls.
Who Is This Portable Air Conditioner For?
AMSTA
Who is the AMSTA AMCLI180E portable air conditioner best suited for? This 3-in-1 portable unit is rated at 18000 BTU and is mainly intended for rooms up to 50 m². It suits buyers who want a single mobile heating and cooling-style setup for summer needs, with cooling and dehumidifier mode included. The dehumidifier function makes it a practical choice for UK spaces that feel damp, and the unit format also fits bedrooms, living rooms and small offices where moving the machine is convenient. For larger homes, the stated coverage limit should be kept in mind, as this model is positioned for up to 50 m².
Dreo Smart 3-in-1 AC516S
After the exhaust hose is routed correctly and the unit is paired in the app, the next step is choosing whether the Dreo Smart 3-in-1 AC516S fits the room and use case. This portable air conditioner is designed to provide cooling, fan, and dehumidifier modes in one unit, making it well suited to bedrooms or smaller rooms where a simple single-device setup is the priority. The 12000 BTU rating is intended for typical home room cooling, although exact coverage depends on room size and insulation. App control supports scheduled adjustments, and remote access is suited to people who want to manage settings without staying by the unit. It is less ideal where fixed installation is required or where heavy-duty output is necessary.
AMSTA: pros
- 18000 BTU of cooling power
- Cools up to 50 m²
- Doubles as a dehumidifier
- Proper cooling you can move between rooms
Cons
- Needs a window for the exhaust hose (unlike an air cooler)
- Uses more electricity than a fan
- Makes some compressor noise, and is bulky to store
Dreo Smart 3-in-1 AC516S: pros
- 12000 BTU of cooling power
- 3-in-1 (cool, fan, dehumidify)
- Wi-Fi/app control
- Remote control included
- Proper cooling you can move between rooms
Cons
- Needs a window for the exhaust hose (unlike an air cooler)
- Uses more electricity than a fan
- Makes some compressor noise, and is bulky to store
Our verdict
Our pick is the Dreo Smart 3-in-1 AC516S (our score 8.5/10) - A practical portable air conditioner (12000 BTU, 3-in-1) for proper, portable cooling around the home. The AMSTA is still worth it if it is cheaper when you check, or if it better matches your specific needs.